Pump rod guide and check



Jllfy 25, 1939 G. E. SLAUGENHOP 2,157,591

PUMP ROD GUIDE AND CHECK Filed March 2, 1936 Patented July 25, 1939UNITED STATES PATENT-OFFICE v z.1s'1,59 1 i Appllltzie geerrlllslnNGZT schime.

The invention relates to guide means for pump rods of oil and other deepwells and provides for Acatching and holding the rod in the event ofbreakage or other cause tending to permit the rod to fall.

The invention aims to provide a 4device that may be lowered to a desiredpoint in the tubing of a well and held therein by friction, and whichwill guide the rod and protect the well tubing from wear and which, inthe event of the rod tending to drop from any cause, will arrest thedescent and prevent the rod from dropping.

While the drawing illustrates a preferred embodiment of the invention,it is to be understood that in adapting the same to meet speciilc needsland requirements, the design may be varied and changes in the minordetails of construction may l be resorted to within the scope of theinvention as claimed, without departing from the spirit thereof.

For a full understanding of the invention and the merits thereof,reference is to be had'to the following description and the drawinghereto attached, in which:

Figure 1 is an elevational view of a rod guide and check embodying theinvention, showing it applied and adapted to be adjusted within a welltubing.

Figure 2 is a similar view taken at a right angle.

Figure 3 is a cross section on the line 3--3 of Figure 1.

Figure 4 is a similar section on the line 4 4 of Figure 1.

Figure 5 is a section on the line 5-5 of Figure 1.

Figure 6 is a fragmentary perspective view of a slip and the part towhich it is pivoted.

Corresponding and like parts are referred to in the followingdescription and designated in the several views of the drawing by likereference characters.

'I'he numeral 23 designates the tubing of an oil or other deep well, and1 a section of rod operable therein. The guide and check comprises anelon` gated tubularbody 9 having a head 9a formed upon opposite sideswith inclined faces III. The rod 1 has a loose fit in the body 9 and ispr'ovided with enlargements forming stops 8 and la to engage the body 9and move it to the desired position within the tubing 23. Flat springsI1,

secured to the head 8a, engage the inner wall of the tube 23 to hold thedevice therein at the required adjusted position. These springs I1 arelocated in recesses I8 formed in the head 9a between the inclined facesI0.

(Cl. Z55-2B) inclined seats Ill. The parts I3, I5 and I4 constitute acarrier for the slips and said carrier is slidable on the body 8 butprevented from' turning thereon by the arms I4 and part I6. When theslips II and its carrier are at the lowest position on the body 9 thedevice may be moved freely within the tubing z3 to the desired posi- 15tion, as will be readily understood. 'I'he springs I1 retain the devicein the located position which is such as not to interfere with the freemovement of the pump rod 1. Should the rod break or tend to fall, thestop 8, being spaced an ap- 20 preciable distance above the head 9a willstrike the head 8a with such a sudden 4and large impact as to overcomethe resistance offered by the inertia of the head 9a and body 9,friction of springs I1 ag nst the casing and the friction of the sprig-pressed slips II against the head 9a, and this impact moves the head9a so quickly that it slides downwardly between the slips II which arestill at rest because of their inertia. As the head moves relative tothe slips I I, it forces them outward to grip the tube. and arrest thedescent of the rod without injury to the rod or tubing. To release therod, it is moved upwardly until the stop 8a strikes the body 9 and liftsit to permit withdrawal of the head 9a a distance to allow the slips IIto release and, with the carrier, drop until the ring I5 engages theflange I6 or like part, thereby permitting the device to be adjustedwithin the well tubing in the manner aforesaid.

Having thus described the invention. what I claim is:

1. A combined rod guide and check comprising a body adapted` forinsertion into a well casing and constructed for slidably receiving apump rod therethrough, said body having a head at one end thereof and alateral stop at the other end, said head having lateral inclined faces,a carrier slidably mounted on the body between the stop and the head andhaving projections extending through the stop for preventing relativerotation, slips pivotally connected with the carrier in position to bearagainst the inclined faces, and friction means for holding the body inthe well casing.

2. A combined rod guide and check comprising a body adapted forinsertion into a well casing and constructed for slidably receiving apump rod therethrough. said body having a head at 'one end thereol` anda lateral stop at the other end. said head having lateral inclinedfaces, a carrier slidably mounted on the body between the stop and thehead and having projections extending through the stop for preventingrelative rotation, slips, pivot pins connecting the slips with .thecarrier in positions to bear against 'the inclined faces, a coiledvspring at each pivot with the ends thereof bearing against the carrierand slip tending to press the slip against the inclined face. andfriction means for holding the body in the well casing.

3. The combination with a pump rod having longitudinally spaced stopsthereon, of a' rod guide and check comprising -a body siidably sleevedon the rod between the' stops, a carrier slidably mounted on the bodyfor relative movement and having slips in position to engage asurrounding casing upon said relative movement in one direction.resilient means for normally holding the body in position 'in the casingfor reciprocating movement of the rod relative thereto, the stops beingarranged in transverse overlapping relation with the body and spacedapart a distance appreciably greater than the length of the body,whereby the rod may reciprocate relative to the body while said body isheld in piace in the casing by the resilient means but upon an extremedownward movement of the rod the stop above 15 the body will engage andmove the same to came engaging movement oi' the slips.

GEORGE E. SLAUGENHDP.

